Can anyone tell if there is a name for the circle theorem which states that any three non-colinear points define a unique circle? Or how may I reference such statement. Perhaps I am too thorough about this?!
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1Hopefully no name. – Jean Marie May 11 '22 at 21:05
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1It's simply "an easily-provable result from elementary Euclidean geometry". (As noted in, say, this recent answer of mine, the "Euclidean" qualifier is important.) – Blue May 11 '22 at 22:30
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2Euclid's Elements, Book IV, Proposition 5. http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0086%3Abook%3D4%3Atype%3DProp%3Anumber%3D5 – paw88789 May 11 '22 at 22:47
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Maybe "existence and uniqueness of circumcircle of triangle"? – Ivan Kaznacheyeu May 12 '22 at 10:02